diff --git a/IRaCIS.Core.Application/Helper/DicomDIRHelper.cs b/IRaCIS.Core.Application/Helper/DicomDIRHelper.cs
index 6defc237e..4b9e83b9a 100644
--- a/IRaCIS.Core.Application/Helper/DicomDIRHelper.cs
+++ b/IRaCIS.Core.Application/Helper/DicomDIRHelper.cs
@@ -100,7 +100,7 @@ namespace IRaCIS.Core.Application.Helper
                     var dicomFile = new DicomFile(dataset);
 
                     // 文件名递增格式：IM_00001, IM_00002, ...
-                    string filename = $@"IMAGE/IM_{index:D5}";  // :D5 表示补足5位
+                    string filename = $@"IMAGE\IM_{index:D5}";  // :D5 表示补足5位
 
                     mappings.Add($"{filename} => {item.InstanceId}");